John and his class visit the Tower of London, where he loses his pet mouse. He falls asleep during a lesson on electricity, but with some help, he learns about it, invades the Tower, and saves his pet.

Pseudonym Dr. Falke follows his wife through disguises and deceptions in postwar Vienna.

Led by British officers, partisans on Crete plan to kidnap the island's German commander and smuggle him to Cairo to embarrass the occupiers.

During a raid on Germany, a British bomber crew is forced to bail out after their plane is damaged. They land in Holland, where they're aided by Dutch civilians.

After a masterful Shakespearean performance in a London theater, Ralph Richardson is sought for an autograph by Fred, his dresser. Later, Fred has joined the Fleet Air Arm (Fly Navy) and become a hero, rescuing a pilot from his burning plane. When Fred arrives at Buckingham Palace, it's Ralph's turn to ask for an autograph.

In the early years of the World War II, the Royal Navy is fighting a desperate battle to keep the Atlantic convoy routes open to supply the British Isles, facing the great danger posed by the many German warships, such as the Admiral Graf Spee, which are scouring the ocean for cargo ships to sink.